Lead-pencil.



G. B. BERGEN.

LEAD PENCIL.

APPLICATION msn MAR. 19, 1914.

Patented June 15,v 1915.

QN. D

GEORGE B. BERG-EN, F SPRINGFIELD, OHIO.

LEAD-PENCIL.

Specification of Letters Patent.

Patented June 15, 1915.

Application led March 19, 1914. Serial No. 825,737.

T0 all whom t may concern Be it known that I, GEORGE B. BERGEN, a

I citizen of the-United States, and resident of Springfield, in the county of Clark and State of Ohio, have invented certain new and -useful Improvements in Lead-Pencils, of which the following is a specification.

My invention relatestolead pencils and has particular reference to a novel permalnent pencil of the type in which the lead is projected by rotation of one of the parts with relation. tovother parts thereof.

Permanent pencils of the Itype just described have been largely manufactured but all thereof have been'open to certain objections, one of the most serious of which is the small lead capacity.

An object of this invention is to provide a pencil of the character described which? its capacity shall have large lead capacity,

of the penbeing only limited by the length cil itself.

It is well understood that in Vpencils of this characterfin order to be commercially acceptable, the manufacturing cost lmust be small and the pencilsheretofore placed on the markethave beenmanufactured with this limitation. Asa result of the difliculties of manufacture and the relativecompleXity of the devices, the pencils have not been well made and therefore quickly get out of order and are discarded. In my construction theparts are ,i perfect article and one which Aof order and is not subject to exceedingly simple, easily manufactured and assembled,- with the result of securing cannot get out extreme wear.

Asis common in pencils of this character, I provide two cylindrical portions, one of which is rotatable relative to the other. At -this point I have departed. from the usual construction'and provide an internal, tubular, slotted, exteriorly threaded 'member which is rigidly' secured to one of the cylindrical containers.- A nut engages this threaded, tubular member, which nut is rotatable with the other tubular casing member and serves .to advance a lead contained within the threaded tube. Thus it will be seen that whilethe tubular casing members are lrotative with relation to each other,'they occupy a fixed bodily relation to each other;I

that is, the members do not slide or' telescope one within the other. Thus the pencil always remains the -same length and conse,

operating 4Awith a nut 17, having a notch or a substantiallyV v out. This result I (secure quently the pencil will have a capacity equal to the full lengthy thereof.

The invention will be more readily understood by reference to the accompanying drawings, wherein, Figure 1 is an elevation of the pencil constructed in accordance with my invention; Fig. 2V is a longitudinal section thereof very much enlarged, and, Fig. 3 is a section on the line 3 3 of Fig. 2.

Referring more particularly tothe drawings it .will be seen that I provide two cylindrical casing members 10, 11, the former constituting the point portion. V In the portion 11, I may prefer to mount an eraser 12. As shown in Fig. 2, the 'portion 11, is telescopedA Within the portion 10, abutting against a shoulder 13, formed internally thereof. Suficient clearance is allowed between the inter-fitted parts to permit free, relative rotation. After the parts are as-l sembled, the rear end ber '10, is angedfdownward into engage- Ament with 'a' circumferential groove 15,

formed in the' member 11. Thus the parts' are permanently united although permitted, free, rotative movement..

Located internally of the member 11, is a rib'16, extending from end to end thereof, this rib actingas a feather or spline and 'corecess 18,v inA the sides thereof. Thus the nut is rotated with the portion 11, but moves longitudinally thereof.

Rigidly secured within the reduced pointv of the portion 10, is the lead-carrying tool 14, of the casing mem- .Y

19, which, as noted, is not split-at its fori Ward end 20, as is customary in order to frictionally hold the lead from dropping by providing internally of the lead tube, a very' slight indentation or annular displacement 21, of

vthe metal. A material advantage'accrues to this construction. In the forms of this de.- vi-ce wherein the lead container is split at vits end in order to frictionally engage the lead, the lea'd is not rigidlyuslipported and under heavy pressure the spllt portions may be bent allowing the lead to fall out. Furtherinore this glVeS a lSPIHY and nude' `105l sirableeffect in writing which is not comr parable to the use of the ordinary wooden lead pencil. In my construction the lead is rigidly held at the point of the pencil and the .effect writing is the same as when using a wooden lead pencil.

y The tubular lead container member 19,

is designed to extend the full length of the pencil. As' shown, the main body portion is slotted as at 22, accommodating a lug'23, integral with a'plunger 24, tted within the longitudinal aperture 25, in the tube. rllhis plunger abuts the lead 26 and advances the same as required under the action of the nut 17.

ln assembling the lead containing tubel 19, is -forced within the reduced portion of the member 10, and pressed, VWelded vor otherwise permanently secured in place.- The plunger 24C, is then inserted from the rear of the tube, the nut 17 is engaged with thethreaded exterior `oE- the tube, and the casing member 11, telescoped Within the casing 10, the flange 14 of which is bent into! engagement With the groove 15, thus completing the assembling. In operation, the casing members are rotated relative to each other until the nut 17 is retracted-to the rear of the casing. Leads are then inserted -in the open end of the tube 19, until the pencil is filled., Thereafter the leads are` advanced byrotating the rear casing member 11 to the right.

It is obvious that the construction shown tting casing members, means for securing said members against longitudinal separation but permitting relative rotation, a tubular,fexteriorly threaded lead container perlll/lfarch, 1911.1.

manently secured to one of said casing mem. bers, and a nut engagingsaid lead con-` tainer and adapted to advance a lead within said container, substantially as described.

`3. lin a pencil, the combination of' intertitting casing members,`me ans for securing said members against longitudinal separation butv permitting relative-rotation, a tubular, slotted, exterior-ly threaded lead container permanently secured to one of said casing members and a nutslidably engaging one Aof said casing members and adapted to be rotated bysaid casing member, said nut being adapted to causethe advance of a lead Within said container, substantially as described.

l flu-a pencil, the combination of interitting casing members, means for securing said members against longitudinal separationbut permitting relative rotation, a tubular, slotted, eXteriorly threaded lead con-- tainer permanently secured tor-oneof said casing members, a nut slidably engaging one of said casing members and adapted to be rotated thereby, and a plunger operating Within said lead vcontainer and adapted to be engaged by said nut whereby a lead in said container is adapted to be advanced, substantially as descrlbed.

5. lin a pencil, the combination of .a pair of telescoped casing members, means for securing said members against longitudinal separation but permitting relativel rotation,

a slotted lead container extending from tamer, and means associated with said nut' for advancing a lead Within said container, substantially asdeScribed.`

Signed vat-Chicago, llll.',this 17th day of Geenen nnnaenn.

A Wimesses;

1 vF. B5B,

Unies.' 1F. HARVEY.

end to fend ofsaid telescoped casing members, said container bemg'fexternally .thread 

